Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4fedf615f208828…

MALICIOUS

PDF

34.7 KB Created: 2020-06-03 12:46:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a25b00cfc5386ffcf2b1db0324fbceff SHA-1: 283db51d133edca5eb12d79df59bfe75a3f67ade SHA-256: d4fedf615f208828c8bed37e12e4eeb7c4cfbdafcfd505f6f34312a9725cbba8
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of embedded links to external websites, many of which are hosted on suspicious domains and appear to be part of a link farm. The document's title suggests a lure for users searching for schedule templates, indicating a phishing or social engineering attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://2vy.undesirable.us/uploads/1/3/1/3/131379163/131379163.html#monthly+shift+schedule+template+excel
    • http://vdscm.net/uploads/1/3/1/3/131398332/d49df019044cd0e.pdf
    • http://patthesatman.com/uploads/1/3/1/4/131452825/87dae38e9.pdf
    • http://vjjanitorialservices.com/uploads/1/3/0/3/130379894/5181036.pdf
    • http://worldviewconsultingltd.com/uploads/1/3/1/6/131637072/wadumavaxorenisesoxa.pdf
    • http://2vy.undesirable.us/uploads/1/3/1/3/131379163/terms.html
    • http://2vy.undesirable.us/uploads/1/3/1/3/131379163/dmca.html
    • http://2vy.undesirable.us/uploads/1/3/1/3/131379163/policy.html
    • https://wubolijog.files.wordpress.com/2020/05/38343553802.pdf
    • https://libofejup.files.wordpress.com/2020/05/60379726333.pdf
    • https://gadaxug.files.wordpress.com/2020/05/xalunijasizukuviviladuded.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005edc.bin
8dd5d294fe4beef2b0975af25b1e75a4dbbd6e2da9e1fced6c4de9e4622eee92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDC 9472 bytes

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